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At a recent White House event, President Trump assessed how America’s allies have responded to the US-Israel war in Iran. He praised some, but was angry with others, notably Britain and its prime minister Keir Starmer. His anger with the UK seemed to centre around a British-owned island in the Indian Ocean, which he referred to as “that stupid island”.

The island is one of about 60, known as the Chagos Islands. Tropical, remote, and very mysterious. So mysterious that one person who knows what goes on there said that if you did too, it would give you vertigo.

The BBC’s diplomatic correspondent James Landale joins us to discuss what happens on the Chagos Islands that makes them so important to President Trump. What have they got to do with Iran, and why are they at the centre of an ever-growing diplomatic row?

Producer: Lucy Pawle

Executive producer: James Shield

Sound engineer: Travis Evans

Senior news editor: China Collins

Photo: File photo of Diego Garcia, the largest island in the Chagos archipelago and site of a major United States military base in the middle of the Indian Ocean. Credit: Reuters